code: def test_identity_initializer(self):
      shape = (3, 3)
      gain = 2
  
      initializer = initializers.Identity(gain=gain)
      values = initializer(shape=shape)
      self.assertEqual(values.shape, shape)
      np_values = backend.convert_to_numpy(values)
      self.assertAllClose(np_values, np.eye(*shape) * gain)
  
      self.run_class_serialization_test(initializer)
  
file_path: keras/keras/initializers/constant_initializers_test.py
imports: import numpy
  from keras import backend
  from keras import initializers
  from keras import testing
label_desc: Use image node_id 5 for calling the ConstantInitializersTest obj's underlying member method code with example usage: obj.test_identity_initializer() without return types